Question

what is correct answer is?​

Answer 1

It is 5m , the answer

Answer 2

Answer:

option (a)

Explanation:

Let the max height reached by the ball be 'H'

using conservation of energy:

intial PE + initial KE = final PE + final KE

(remember ball momentarily stops at the highest point implying KE = 0)

$mg\frac{H}{2} + \frac{1}{2}mv^{2} = mgH\\\\\frac{1}{2}mv^{2} = mg\frac{H}{2}\\\\H = \frac{v^{2}}{g}$

H = 10²/10 = 10m